4 Security Considerations

For encrypted documents, the block number 0 is reused for every field of an OfficeArtBStoreContainerFileBlock record (described in [MS-ODRAW] section 2.2.22) within the Pictures Stream.

Additional security considerations for encrypted documents are described in [MS-OFFCRYPTO] section 4.1.3.2.

See the CryptSession10Container record (section 2.3.7) for more information about how to encrypt and decrypt encrypted documents.